摘要
碱性过硫酸钾消解紫外分光光度法测定总氮时,经常会出现空白吸光值偏高的情况。通过一系列对比试验,发现高纯度的过硫酸钾、氢氧化钠、优质的试验用水、消解时间足够及消解过程中的压力和温度稳定是保证总氮空白值符合标准的关键因素。
The higher absorbance of blank test was observed when we analyzed the total nitrogen using alkaline potassium persulfate digestion—UV spectrophotometric method.Through a series of comparative trial,It was found that the high-purity of potassium persulfate and sodium hydroxide,the good quality of testing water,the digestion time enough as well as the stable of pressure and temperature during the disintegration process were always the key factors to keep a standard blank value in the analysis.
出处
《能源环境保护》
2009年第3期51-54,共4页
Energy Environmental Protection
